feature-removal-schedule.txt: schedule the deprecated form of kmap_atomic() for removal

Signed-off-by: Cong Wang <amwang@redhat.com>
diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
index a0ffac0..7465332 100644
--- a/Documentation/feature-removal-schedule.txt
+++ b/Documentation/feature-removal-schedule.txt
@@ -524,3 +524,11 @@
 Why:	The code is not actively maintained and platforms are now hard to find.
 Who:	Nicolas Ferre <nicolas.ferre@atmel.com>
 	Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
+
+----------------------------
+
+What:	kmap_atomic(page, km_type)
+When:	3.5
+Why:	The old kmap_atomic() with two arguments is deprecated, we only
+	keep it for backward compatibility for few cycles and then drop it.
+Who:	Cong Wang <amwang@redhat.com>